Size: 3 , Magic sum: 15 
 
  8  1  6
  3  5  7
  4  9  2

Size: 5 , Magic sum: 65 
 
 17 24  1  8 15
 23  5  7 14 16
  4  6 13 20 22
 10 12 19 21  3
 11 18 25  2  9

Size: 7 , Magic sum: 175 
 
 30 39 48  1 10 19 28
 38 47  7  9 18 27 29
 46  6  8 17 26 35 37
  5 14 16 25 34 36 45
 13 15 24 33 42 44  4
 21 23 32 41 43  3 12
 22 31 40 49  2 11 20